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《Chaos, solitons, and fractals》2005,23(3):711-726
The Riemann–Einstein tensor of general relativity as well as chiral and super-symmetry are utilized to develop various extended versions of the standard model of high energy physics.Based on these models, it is possible to predict that few new elementary particles conjectured to be the Higgs are likely to be found experimentally at an energy scale which is just above that of the electroweak. Connections to the massless states of different super-string theories as well as super-gravity are also discussed. 相似文献
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D. R. K. Reddy R. Santhi Kumar T. V. Pradeep Kumar 《International Journal of Theoretical Physics》2013,52(4):1214-1220
A five dimensional Kaluza-Klein space-time is considered in the frame work of a scalar-tensor theory proposed by Saez and Ballester (Phys. Lett. A 113, 467, 1985) when the source for energy momentum tensor is a bulk viscous fluid containing one dimensional strings. A barotropic equation of state for the pressure and density is assumed to get a determinate solution of the field equations. Also the bulk viscous pressure is assumed to be proportional to the energy density. The physical and kinematical properties of the model are also discussed. 相似文献
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本文研究了亚纯函数与其复微差分多项式的唯一性.在有限级的限制下,文章建立了三个涉及亚纯函数$f$与其微差分多项式$L^{n}_{eta}f=sum_{k=0}^{n}a_{k}f(z+keta)+a_{-1}f''$ 唯一性定理,所获结果进一步刻画了$f(z)equiv L^{n}_{eta}f(z)$的特性,例子说明了结果的精确性. 相似文献
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In this paper, we investigate the evolution of dark energy parameter in the spatially homogeneous and isotropic Friedmann-Robertson-Walker (FRW) model filled with barotropic fluid and dark energy in the framework of scalar-tensor theory of gravitation formulated by Saez and Ballester (Phys. Lett. A 113:467, 1986). To obtain a determinate solution special law of variation for Hubble’s parameter proposed by Bermann (Nuovo Cimento B 74:183, 1983) is used. We consider the two cases of interacting and non-interacting fluid (barotropic and dark energy) scenario and obtained general results. The physical aspects of the results obtained are also discussed. 相似文献
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《Analytica chimica acta》1970,49(2):335-341
A rapid compleximetric method is presented for the determination of aluminium and titanium in ores and silicates such as bauxite, clay, ilmenite, cements and ceramic products. Excess of EDTA is added to an aliquot of the acid sample solution, the pH is adjusted with hexamine and the excess of EDTA is titrated with a combined solution of copper and zinc in the presence of xylenol orange and PAN as indicators. For the simultaneous titration, fluoride is added to release the EDTA combined with both aluminium and titanium. For the stepwise titration, phosphate is added to release the EDTA combined with titanium, and then fluoride is added to release the EDTA combined with aluminium. The method avoids the problem of titanium hydrolysis encountered by previous workers. 相似文献
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G.M. Sravani N. Murali B. Chandra Sekhar B. Dhanalakshmi D. Parajuli T. Gunavardhana Naidu Ritesh Verma Rajesh Kumar Bal Krishan K. Samatha 《印度化学会志》2022,99(6):100465
Sol-gel auto combustion method was adopted for the synthesis of Bi1-xCaxFeO3 (x = 0.00, 0.05, 0.1, 0.15, 0.2 and 0.25) multiferroic nanoparticles and their structural and electric properties were investigated. The two peaks at (012) and (110) planes at diffracting angles (2θ) of 31.9° and 32.1° in the XRD pattern indicates their rhombohedral structure with the R3c space group. The cole-cole plot in the 10 Hz–1 MHz frequency range shows the increasing semicircles shifting towards higher frequency, indicating increasing grain and grain boundaries. 相似文献
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